Math Comment Spam Protection Plugin

Comment Spam is killing me! So is email spam. Here is a cool plugin for Wordpress, this plugin asks the visitor making the comment to answer a simple math question.
This is intended to prove that the visitor is a human being and not a spam robot. I’m thinking of installing this plugin… maybe… How come nobody comes up with this idea in emails? Say if I send an email from Gmail to Hotmail and to identify if the sender is a human, hotmail will email me a maths question for me to answer. Is this not a better way to filter spam?
Tags: Comment Spam Protection, Math Comment Spam, Spam Plugin, Wordpress Spam
